If you could go back in time, once, and change a single thing – what would it be?

Nothing, cause if I changed anything I would not be who i am, where I am with the knowledge i have and the people in my life.. my past was my teacher, I learned from it good and bad, my present is my chance to be happy and my future is mine to grab and make the best out of it. But if I changed anything from my past none last of this would be real. I am stronger, wiser and more caring for it so I would not change a thing

Pet rocks. And disco.

That's probably like playing with fire. Who knows what consequences might come of that.

Play with fire and you may get burned.

I'd have had the insight years earlier that I do today about how precious and short life really is.

The birth of donald trump. Tell his dad to pull out because he would make a big mistake.

i know what it would be, but not sharing it here

I would have much better role models as a kid

Kill my Dad before he ever laid a hand on my Mom...

My bio parents never meeting

Change my harsh words to good

What happened to Duke

I'd stand in the way of Old Biff from the future and Doc and Marty so that Old Biff doesn't see the Sports Almanac and end up going back in time to give his younger self the almanac and possibly fucking up the space time continuum.

my gender

Change the mindset of the people who run the planet in such a way that they would opt for a resource-based economy, rather than a monetary-based one. We would have an entirely different world.

I would have listened to my self, the choice I made, at 2010. The world would be total different to me.

What i want to change could not change because even if i went back it would still happen.

I would accept the place at Uni to study computer science was back when